Phosphorus Adsorption Isotherm: A Key Aspect for Soil Phosphorus Fertility Management

Journal Title: Journal of Experimental Agriculture International - Year 2015, Vol 6, Issue 2

Abstract

Characterization of soils in terms of phosphorus adsorption capacity is fundamental for effective soil phosphorus fertility management and for efficient utilization of phosphorus fertilizers. Thus, this study was conducted to investigate the phosphorus adsorption characteristics of soils of two farms and to elucidate the implication of soil phosphorus adsorption isotherm studies for soil phosphorus fertility management. The two farms, representing the major farming systems of the respective districts, were selected from Adele village in Haramaya district and Bala Langey village in Kersa district in eastern Ethiopia. Soil samples were collected from the crop fields at Adele and Bala Langey farms. Two different P-bearing sources, potassium dihydrogen phosphate (KH2PO4) and diammonium phosphate (DAP-(NH4)2HPO4), were used for the adsorption isotherm studies. The adsorption data were fitted to the linear and Freundlich adsorption isotherm models. Both models revealed that soils of both farms had different P adsorption capacity from the two P sources. Amount of P adsorbed from DAP solution was higher than the amount of P adsorbed from KH2PO4 solution in soils of both farms. Phosphorus adsorption capacity of Adele farm soils was higher than that of Bala Langey farm soils. Therefore, soils of the two farms should be managed differently for P fertility. Percentages of P adsorbed (% Pa) and P remained in the equilibrium solution (% EC) were also calculated. By plotting the two percentages i.e. % Pa and % EC against the initial concentration of P (IC), two regions were observed. The two regions were described as P intensity and quantity factor windows. Based on the intensity and quantity factor windows, at currently existing soil condition, between 200 and 500 kgha-1 P should be applied as fertilizer to soils of Adele at 0-30 cm depth for immediate benefits and soil P fertility maintenance.

Authors and Affiliations

Lemma Wogi, J. J. Msaky, F. B. R. Rwehumbiza, Kibebew Kibret

Keywords

Related Articles

Seed Maize (Zea mays L.) Quality Factors from Five Agro-ecological Zones in Ghana and Their Impact on Growth and Grain Yield

This experiment was conducted in the field and laboratory to evaluate the impact of seed quality attributes on emergence, germination, growth and grain yield. Obatanpa (local maize) seeds produced under certified and far...

Effect of Petroleum Products Treatment of Soil on Succinate Dehydogenase and Lactate Dehydogenase Activities in Cowpea (Vigna unguiculata) and Maize (Zea mays) Seedlings

Aim: Most of the land in oil producing area in the Niger delta region of Nigeria is under constant petroleum pollution exposing the soil to the deleterious effect of petroleum hydrocarbons. The effects of petroleum produ...

Evaluation of Cowpea (Vigna unguiculata L.) Genotypes’ Growth and Yield Performance and Resistance to the Cowpea Seed Beetle, Callosobruchus maculatus F.

The search for resistant cowpea (Vigna unguiculata (L.)) Walp. genotypes against the cowpea seed beetle Callosobruchus maculatus F. (Coleoptera: Chrysomelidae) in order to minimize the use of synthetic insecticides due t...

Physical and Dietary Properties of In-shell Pine Nuts (Pinus pinea L.) and Kernels

Aims: This study aims at determining physical and chemical properties of Turkish pine nut shells and kernels over a time span. Besides, changes in composition and nutritive value of the pine nut are evaluated according t...

Forage Intake and Wastage by Ewes in Pea/Hay Barley Swath Grazing and Bale Feeding Systems

Harvested feed costs, particularly during the winter, are traditionally the highest input associated with a ruminant livestock operation. Although swath grazing has been practiced for over 100 years and literature exists...

Download PDF file
  • EP ID EP354225
  • DOI 10.9734/AJEA/2015/13363
  • Views 86
  • Downloads 0

How To Cite

Lemma Wogi, J. J. Msaky, F. B. R. Rwehumbiza, Kibebew Kibret (2015). Phosphorus Adsorption Isotherm: A Key Aspect for Soil Phosphorus Fertility Management. Journal of Experimental Agriculture International, 6(2), 74-82. https://europub.co.uk/articles/-A-354225